Mineral (Evaporite)

Likely garnet (rough crystal)

Garnet group; possibly almandine, (Fe₃Al₂(SiO₄)₃)

Likely garnet crystal

Garnet-group silicate; species cannot be determined from the image

Blue-gray mineral specimen (possibly sodalite)

Undetermined; appearance may be consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), but the image is insufficient for reliable identification

Weathered granite

Granite, a quartz–feldspar–mica intrusive igneous rock

Iron-stained brown mineral/rock fragment

Most likely limonite/goethite-rich material (hydrated iron oxides), possibly weathered ironstone; exact identification requires testing

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Potassium Feldspar (Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Desert Rose (Gypsum / Barite Rose)

Hydrated Calcium Sulfate (CaSO4·2H2O) / Barium Sulfate (BaSO4)

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly with iron-oxide staining and minor associated minerals

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Tumbled garnet-bearing rock (possible almandine garnet)

Likely almandine garnet, Fe₃Al₂(SiO₄)₃, in a dark host rock; identification is uncertain from the image alone.

Desert Rose

Baryte or Gypsum (Selenite) with Sand Inclusions (BaSO4 or CaSO4·2H2O)

Desert Rose (Barite Rose / Gypsum Rose)

Barium Sulfate (BaSO4) or Hydrated Calcium Sulfate (CaSO4·2H2O)

Desert Rose

Gypsum (CaSO4·2H2O) or Barite (BaSO4)

Sedimentary Sandstone with Iron Oxide

Ferruginous Sandstone

Limonite

FeO(OH)·n(H2O)

Pyrite

Iron Sulfide (FeS2)

Yooperlite (Sodalite-bearing Syenite)

Sodalite-rich Syenite

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

Desert Rose

Gypsum or Baryte rosette (CaSO4·2H2O or BaSO4)

Weathered feldspar-rich pegmatite (likely orthoclase or plagioclase)

Granitic pegmatite; predominantly K-feldspar/plagioclase (KAlSi₃O₈–NaAlSi₃O₈), with quartz and dark mafic minerals

Rounded mixed-grain river pebble, likely granitic rock

Granite (tentative; exact rock type cannot be confirmed from the photograph)

Garnet in marble

Likely almandine or pyrope garnet (X₃Y₂(SiO₄)₃) in calcite marble; species cannot be confirmed from the image alone.

Granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Pegmatite

Igneous Pegmatite

Chalcopyrite

Copper iron sulfide (CuFeS2)

Weathered granite

Granite, a coarse-grained felsic intrusive rock composed mainly of quartz, feldspar, and mica

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Quartz-bearing pegmatitic rock with feldspar

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Granitic Gneiss

Gneiss (Metamorphic Rock)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Likely garnet (rough, iron-rich variety)

Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; image alone cannot confirm identification

Dark mineral nodule with white veining

Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)

Quartz variety (SiO2) / Polycrystalline Quartz Aggregate

Serpentinite (probable)

Serpentinite, a rock composed chiefly of serpentine-group minerals such as antigorite, lizardite, or chrysotile